Determination of pore-scale hydrate phase equilibria in sediments using lab-on-a-chip technology

Lab on a Chip ◽  
2017 ◽  
Vol 17 (23) ◽  
pp. 4070-4076 ◽  
Author(s):  
Stian Almenningen ◽  
Josef Flatlandsmo ◽  
Anthony R. Kovscek ◽  
Geir Ersland ◽  
Martin A. Fernø
Keyword(s):  
Porous Media ◽  
Phase Equilibria ◽  
Lab On A Chip ◽  
Pore Scale ◽  
Experimental Protocol ◽  
Fast Determination ◽  
Chip Technology ◽  
Hydrate Phase ◽  
Hydrate Stability

We present an experimental protocol for fast determination of hydrate stability in porous media for a range of pressure and temperature conditions.

Lab-on-a-chip technology for determination of protein isoform profiles

2006 ◽  
Vol 1127 (1-2) ◽  
pp. 175-182 ◽  
Author(s):  
Maria Lönnberg ◽  
Jan Carlsson
Keyword(s):  
Lab On A Chip ◽  
Chip Technology ◽  
Protein Isoform

A fractal approach on modeling gas hydrate phase equilibria in porous media

2013 ◽  
Vol 356 ◽  
pp. 277-283 ◽  
Author(s):  
Sheng-Li Li ◽  
Qing-Lan Ma ◽  
Chang-Yu Sun ◽  
Li-Tao Chen ◽  
Bei Liu ◽  
...  
Keyword(s):  
Porous Media ◽  
Phase Equilibria ◽  
Gas Hydrate ◽  
Fractal Approach ◽  
Hydrate Phase

Hydrate phase equilibria in porous media: effect of pore size and salinity

Terra Nova ◽  
2002 ◽  
Vol 14 (5) ◽  
pp. 307-312 ◽  
Author(s):  
Kasper K. Østergaard ◽  
Ross Anderson ◽  
Maria Llamedo ◽  
Bahman Tohidi
Keyword(s):  
Porous Media ◽  
Phase Equilibria ◽  
Pore Size ◽  
Media Effect ◽  
Hydrate Phase

Modelling of Hydrate Phase Equilibria in Porous Media

2001 ◽  
Author(s):  
K.K. Østergaard ◽  
M. Llamedo ◽  
B. Tohidi
Keyword(s):  
Porous Media ◽  
Phase Equilibria ◽  
Hydrate Phase

Modeling Gas Hydrate Phase Equilibria in Laboratory and Natural Porous Media

2001 ◽  
Vol 40 (20) ◽  
pp. 4197-4208 ◽  
Author(s):  
Jeffery B. Klauda ◽  
Stanley I. Sandler
Keyword(s):  
Porous Media ◽  
Phase Equilibria ◽  
Gas Hydrate ◽  
Hydrate Phase

Wettability Characterization from Pore-Scale Images Using Topology and Energy Balance with Implications for Recovery and Storage

2021 ◽  
Author(s):  
Martin Blunt ◽  
Luke Kearney ◽  
Abdulla Alhosani ◽  
Qingyang Lin ◽  
Branko Bijeljic
Keyword(s):  
Contact Angle ◽  
Porous Media ◽  
Energy Balance ◽  
Accurate Determination ◽  
Direct Determination ◽  
Contact Angles ◽  
Pore Scale ◽  
Three Phase ◽  
And Storage

Abstract We present two methods to measure contact angles inside porous media using high-resolution images. The direct determination of contact angle at the three-phase contact line is often ambiguous due to uncertainties with image segmentation. Instead, we propose two alternative approaches that provide an averaged assessment of wettability. The first uses fundamental principles in topology to relate the contact angle to the integral of the Gaussian curvature over the fluid-fluid meniscus. The advantage of this approach is that it replaces the uncertain determination of an angle at a point with a more accurate determination of an integral over a surface. However, in mixed-wet porous media, many interfaces are pinned with a hinging contact angle. For predictive pore-scale models, we need to determine the contact angle at which displacement occurs when the interfaces move. To address this problem we apply an energy balance, ignoring viscous dissipation, to estimate the contact angle from the meniscus curvature and changes in interfacial areas and saturation. We apply these methods to characterize wettability on pore-scale images of two- and three-phase flow. We also discuss the implications of the results for recovery and storage applications.

scholarly journals Detection of Cellular Parameters Using a Microfluidic Chip-Based System

2002 ◽  
Vol 7 (4) ◽  
pp. 85-89 ◽  
Author(s):  
Tobias Preckel ◽  
Gerd Luedke ◽  
Samuel D. H. Chan ◽  
Benjamin N. Wang ◽  
Robert Dubrow ◽  
...  
Keyword(s):  
Lab On A Chip ◽  
Microfluidic System ◽  
Microfluidic Channels ◽  
Microfluidic Chips ◽  
Fluorescence Detector ◽  
Single File ◽  
Chip Technology ◽  
Cell Assays ◽  
Pressure Driven Flow

Lab-on-a-chip technology achieves a reduction of sample and reagent volume and automates complex laboratory processes. Here, we present the implementation of cell assays on a microfluidic platform using disposable microfluidic chips. The applications are based on the controlled movement of cells by pressure-driven flow inside networks of microfluidic channels. Cells are hydrodynamically focused and pass the fluorescence detector in single file. Initial applications are the determination of protein expression and apoptosis parameters. The microfluidic system allows unattended measurement of six samples per chip. Results obtained with the microfluidic chips showed good correlation with data obtained using a standard flow cytometer.

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